added a notes file for important running stuff

Create working for tenant and added in efcore and data layer

Emergence.data/Extensions/ServiceBuilderExtension.cs

@@ -0,0 +1,19 @@
+using Emergence.data.Contexts;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+
+namespace Emergence.data.Extensions;
+
+public static class ServiceBuilderExtension
+{
+    public static IServiceCollection AddDataServices(this IServiceCollection services, IConfigurationManager configuration)
+    {
+        var connectionString = configuration.GetConnectionString("AdminConnection") ?? throw new InvalidOperationException("Connection string 'AdminConnection' not found.");
+        services.AddDbContext<AdminDbContext>(options =>
+            options.UseSqlServer(connectionString, x => x.MigrationsAssembly(typeof(AdminDbContext).Assembly.FullName)));
+
+        return services;
+    }
+}